生活条件改善就会有较多的活产,较少的死产.Better living conditions mean more live births and fewer stillbirths.他们不得不经常设法应付较少的利润额.They have always had to make do with relatively small profit margins.通常睡眠轻的婴儿长大后仍然只需要较少的睡眠。Wakeful babies will o...
我们的骨髓中含有小球状的脂肪。Our bone marrow contains fat in the form of small globules.全世界有2,000名儿童需要骨髓移植。There are 2,000 children worldwide who need a bone marrow transplant.骨髓捐献者是她14个月大的妹妹。The marrow donor is her 14-month-old siste...